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jdpilotDec-30-03 07:50 AM
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#65479, "Bad compression numbers."


          

If I have numbers of 110 across all 4 cylinders, could it be pistons or head?? Just need an idea of where to start. Its rebuild time folks Thanks emoji


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Replies to this topic
RE: Bad compression numbers., TeamDR1665, Dec-30-03 08:49 AM, #1
RE: Bad compression numbers., TeamMetalJim, Dec-30-03 01:29 PM, #2
RE: Bad compression numbers., Global Ruler Of All ThingsDarkOne, Dec-30-03 06:58 PM, #3
      RE: Bad compression numbers., FarOutKucki, Dec-30-03 09:27 PM, #4
      RE: Bad compression numbers., TeamMichael_97RS, Dec-31-03 08:37 AM, #5
      RE: Bad compression numbers., MotoFool, Dec-31-03 12:38 PM, #6
           RE: Bad compression numbers., Uberingram, Dec-31-03 01:13 PM, #7
      RE: Bad compression numbers., TeamDR1665, Jan-01-04 09:11 AM, #8

TeamDR1665Dec-30-03 08:49 AM
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#65483, "RE: Bad compression numbers."
In response to Reply # 0


          

Do a leakdown. If the numbers go up - rings. If they stay the same - head. emoji

  

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TeamMetalJimDec-30-03 01:29 PM
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#65489, "RE: Bad compression numbers."
In response to Reply # 1




          

Could also be the pressure tester itself. Is the car running like poop? Cause yeah, 110 is about half compression.


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Global Ruler Of All ThingsDarkOneDec-30-03 06:58 PM
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#65497, "RE: Bad compression numbers."
In response to Reply # 1




          

Originally posted by DR1665
Do a leakdown. If the numbers go up - rings. If they stay the same - head. emoji

a leakdown IS NOT a compression test with a cap of oil in the chamber. That's a WET TEST. A Leakdown is application of pressurized air and monitoring how much pressure the cylibder holds, and where the air leaks through. Oil cap = rings. Rad cap = HG. TB or tailpipe, valves.

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FarOutKuckiDec-30-03 09:27 PM
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#65498, "RE: Bad compression numbers."
In response to Reply # 3




          

Originally posted by DarkOne
Originally posted by DR1665 Do a leakdown. If the numbers go up - rings. If they stay the same - head. emoji
a leakdown IS NOT a compression test with a cap of oil in the chamber. That's a WET TEST. A Leakdown is application of pressurized air and monitoring how much pressure the cylibder holds, and where the air leaks through. Oil cap = rings. Rad cap = HG. TB or tailpipe, valves.


hes right you know. a leakdown tester is a unit with two gauges, one for psi going into the cylinder and one for compression, and you basically look for bubbles in coolant or listen for where air is escaping.

sorry brian just felt like stickin it to ya:thumbsup

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TeamMichael_97RSDec-31-03 08:37 AM
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#65531, "RE: Bad compression numbers."
In response to Reply # 3


          

Originally posted by DarkOne
a leakdown IS NOT a compression test with a cap of oil in the chamber. That's a WET TEST. A Leakdown is application of pressurized air and monitoring how much pressure the cylibder holds, and where the air leaks through. Oil cap = rings. Rad cap = HG. TB or tailpipe, valves.


ding ding ding, we have a winner.

110 definately sounds low, I would try it with another tester. All the cylinders being that bad is kind of surprising.



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MotoFoolDec-31-03 12:38 PM
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#65540, "RE: Bad compression numbers."
In response to Reply # 5


          

what elevation are you at that changes alot with air density..

and try another tester.

You can have it cheap, fast or good. Pick any two.

If you want it cheap and fast, it's not going to be good.
If you want it cheap and good, it's not going to be fast.
If you want it good and fast, it's not going to be cheap.

  

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UberingramDec-31-03 01:13 PM
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#65544, "RE: Bad compression numbers."
In response to Reply # 6


          

if you're on the moon emoji

I dont care what elevation, those numbers are skewed.

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TeamDR1665Jan-01-04 09:11 AM
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#65575, "RE: Bad compression numbers."
In response to Reply # 3


          

Originally posted by DarkOne
Originally posted by DR1665 Do a leakdown. If the numbers go up - rings. If they stay the same - head. emoji
a leakdown IS NOT a compression test with a cap of oil in the chamber. That's a WET TEST. A Leakdown is application of pressurized air and monitoring how much pressure the cylibder holds, and where the air leaks through. Oil cap = rings. Rad cap = HG. TB or tailpipe, valves.



I, the humble choad, bow down to the wisdom radiating from the omnipotent 2GNT patriarch. emoji

You never know you don't know until someone tells you so. Thanks sir. :thumsbup

  

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